Numerical predictions of turbulence/cascade-interaction noise using computational aeroacoustics with a stochastic model
Numerical predictions of turbulence/cascade-interaction noise using computational aeroacoustics with a stochastic model
Turbulent-flow interactions with the outlet guide vanes are known to mainly contribute to broadband-noise emission of aeroengines at approach conditions. This paper presents a three-dimensional computational aeroacoustics hybrid method aiming at simulating the aeroacoustic response of an annular cascade impacted by a prescribed homogeneous isotropic turbulent flow. It is based on a time-domain Euler solver coupled to a synthetic turbulence model implemented in the code by means of a suited inflow boundary condition. The fluctuating pressure over the airfoil surface provided by computational aeroacoustics is used as an input to a Ffowcs Williams and Hawkings integral method to calculate the radiated sound field. Euler computations are first validated against an academic computational aeroacoustics benchmark in the case of an harmonic gust interacting with an annular flat-plate cascade. Then, simulations are applied to turbulence–cascade interactions for annular configurations, in uniform and swirling mean flows, and numerical results in terms of sound power spectra in the outlet duct are compared to semi-analytical and numerical solutions, and to an available experiment.
3551-3566
Polacsek, Cyril
ce796664-12b3-4def-b61d-300997b3026f
Clair, Vincent
4fc28cab-f835-4f4e-a50d-0040865da0ff
Le Garrec, Thomas
d906a8fc-8b01-4998-93d5-49826a236064
Reboul, Gabriel
7b1404db-e4e9-4a9f-bc9e-c9db213e4daf
Jacob, Marc
bfb5914f-452e-4082-a154-1c56a5e4d3fc
December 2015
Polacsek, Cyril
ce796664-12b3-4def-b61d-300997b3026f
Clair, Vincent
4fc28cab-f835-4f4e-a50d-0040865da0ff
Le Garrec, Thomas
d906a8fc-8b01-4998-93d5-49826a236064
Reboul, Gabriel
7b1404db-e4e9-4a9f-bc9e-c9db213e4daf
Jacob, Marc
bfb5914f-452e-4082-a154-1c56a5e4d3fc
Polacsek, Cyril, Clair, Vincent, Le Garrec, Thomas, Reboul, Gabriel and Jacob, Marc
(2015)
Numerical predictions of turbulence/cascade-interaction noise using computational aeroacoustics with a stochastic model.
AIAA Journal, 53 (12), .
(doi:10.2514/1.J053896).
Abstract
Turbulent-flow interactions with the outlet guide vanes are known to mainly contribute to broadband-noise emission of aeroengines at approach conditions. This paper presents a three-dimensional computational aeroacoustics hybrid method aiming at simulating the aeroacoustic response of an annular cascade impacted by a prescribed homogeneous isotropic turbulent flow. It is based on a time-domain Euler solver coupled to a synthetic turbulence model implemented in the code by means of a suited inflow boundary condition. The fluctuating pressure over the airfoil surface provided by computational aeroacoustics is used as an input to a Ffowcs Williams and Hawkings integral method to calculate the radiated sound field. Euler computations are first validated against an academic computational aeroacoustics benchmark in the case of an harmonic gust interacting with an annular flat-plate cascade. Then, simulations are applied to turbulence–cascade interactions for annular configurations, in uniform and swirling mean flows, and numerical results in terms of sound power spectra in the outlet duct are compared to semi-analytical and numerical solutions, and to an available experiment.
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Accepted/In Press date: 9 March 2015
e-pub ahead of print date: 7 October 2015
Published date: December 2015
Organisations:
English
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Local EPrints ID: 382331
URI: http://eprints.soton.ac.uk/id/eprint/382331
ISSN: 0001-1452
PURE UUID: 2e5f52b0-0305-498a-bbd5-41efae4f8337
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Date deposited: 29 Oct 2015 09:16
Last modified: 14 Mar 2024 21:27
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Author:
Cyril Polacsek
Author:
Vincent Clair
Author:
Thomas Le Garrec
Author:
Gabriel Reboul
Author:
Marc Jacob
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